Acicular


shaped like a needle.
Metallurgy.

(of cast iron) containing ferrite in a needlelike form.
(of an alloy) having a microstructure of needlelike components.

Historical Examples

Hyoscyamine crystallizes in the acicular form, with greater difficulty even than atropine, it also forms less compact crystals.
Scientific American Supplement, No. 324, March 18, 1882 Various

By repeated solutions in alcohol it may be obtained under the form of white, silky, acicular crystals.
Cooley’s Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades…, Sixth Edition, Volume I Arnold Cooley

They were not small and acicular, were nearly alike in the three basins, and had effloresced only on a few minute points.
Quarterly Journal of Science, Literature and the Arts, July-December, 1827 Various

It crystallizes in the orthorhombic system, and the crystals are either prismatic or acicular in habit.
Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 3 Various

Valve very narrow, lanceolate, acicular, with obtuse apices.
The Diatomaceae of Philadelphia and Vicinity Charles Sumner Boyer

acicular, as-ik′ū-lar, adj. needle-shaped; slender and sharp-pointed.
Chambers’s Twentieth Century Dictionary (part 1 of 4: A-D) Various

The picrate of silver forms beautiful starry groups of acicular crystals, having the colour and lustre of gold.
Cooley’s Practical Receipts, Volume II Arnold Cooley

Spores of Bacidia fuscorubella to illustrate the several-celled, hyaline, acicular type.
Ohio Biological Survey, Bull. 10, Vol. 11, No. 6 Bruce Fink and Leafy J. Corrington

By re-solution in alcohol it may be obtained under the form of colourless, prismatic, acicular crystals.
Cooley’s Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades…, Sixth Edition, Volume I Arnold Cooley

Soon Birdie and myself were a mass of acicular crystals; it was a true easterly fog.
Celebrated Women Travellers of the Nineteenth Century W. H. Davenport Adams

Read Also:

  • Aciculate

    having . marked as with needle scratches. needle-shaped; acicular. Historical Examples aciculate: a surface that appears as if scratched with a needle. Explanation of Terms Used in Entomology John. B. Smith adjective having aciculae marked with or as if with needle scratches

  • Aciculum

    an . Zoology. one of the slender, sharp stylets embedded in the parapodia of certain annelid worms, as the polychaetes. noun (pl) -lums, -la (-lə) a needle-like bristle that provides internal support for the appendages (chaetae) of some polychaete worms

  • Acid anhydride

    See under (def 1). a compound formed by removing water from a more complex compound: an oxide of a nonmetal (acid anhydride) or a metal (basic anhydride) that forms an acid or a base, respectively, when united with water. a compound from which water has been abstracted. Historical Examples Like most of the oxides of […]

  • Acid

    Chemistry. a compound usually having a sour taste and capable of neutralizing alkalis and reddening blue litmus paper, containing hydrogen that can be replaced by a metal or an electropositive group to form a salt, or containing an atom that can accept a pair of electrons from a base. Acids are proton donors that yield […]

  • Acid cell

    Electricity. a cell using an acid electrolyte. . acid cell n. See parietal cell.


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